
import java.util.*;

public class MySet {
	public static void main(String[] args) {
		var sc = new Scanner(System.in);
		int n = sc.nextInt();
		var se = new TreeSet<Integer>();
		for(int i = 1; i <= n; i ++ ) {
			se.add(sc.nextInt());
		}
		for(int i : se) {
			System.out.print("i = " + i + "\n");
		}
	}
}
